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Fabricjs canvas - 27/04/2018 04:00 EDT

Fabricjs canvas with the following features:

• Zoom in and out features: if canvas exceeds surrounding div element, scrolling bars appear accordingly. Image aspect ratio is always preserved. Zoom in/out is set by mousewheel.

• Undo and Redo features.

• On page load, ten red circles (named 1,2…,10) are displayed on top of canvas. Ten red circles on bottom (A,B…, J). Circles can’t be scaled by user. For each circle, a label with circle name is displayed. Fabricjs per-pixel drag and drop feature is granted for every circle.

• Canvas hosts 1 or 2 background images (overlapped with opacity parameter manually settable by user). Background images are uploaded by user. User can choose a background and bring it to front every moment.

• Circles 1 and 2 are linked by a line. The same for circles A and B.

• Circles 3,4,5 and 6 are linked by a cubic Bezier curve with handles (like this [url removed, login to view]). The same for circles C,D,E and F.

A side menu for object and properties management which:

• Lists all 20 circles. If a circle name is clicked on this list, its corresponding circle object on canvas changes color (green). If a circle is moved (dragged) on canvas, its corresponding circle name is highlighted on this list.

• lists background images and allows user to select a background and bring it to front.

• hosts a slider to set background images opacity (and corresponding feature)

• hosts a check button that allows user to show/hide circle labels (and corresponding feature)

• hosts undo and redo buttons and a list of events (and corresponding feature)

• hosts a button to remove selected object (and corresponding feature)

• hosts a print button to print canvas content (and corresponding feature)

• hosts a button to export canvas content as image (and corresponding feature)

• hosts a button to upload background image(s) (and corresponding feature)

• hosts a button to export canvas content as a JSON file (and corresponding feature)

• hosts a button to import JSON file to canvas (and corresponding feature)

• hosts a button to export XY coordinates of circles to txt file (and corresponding feature)

• hosts a button to import XY coordinates of circles from txt file and shows them accordingly on canvas

Important note: after file import, object properties and limitations must be preserved (e.g. as said above, circles can’t be scaled. So, this limitation must be preserved after import).

Kemahiran: CSS, HTML, Javascript, jQuery / Prototaip, PHP

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Tentang Majikan:
( 0 ulasan ) Italy

ID Projek: #16797855

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